Effect of impurities on sintering and conductivity of yttria-stabilized zirconia
نویسندگان
چکیده
The effect of low concentrations of Fe203, AI203 and Bi203 on the sintering behaviour of (ZrO2)o.83 (YO1.s)o.17, made by alkoxide synthesis, has been investigated. The best results are achieved with Bi203 as a sinter agent and a relative density of 95% is obtained at 1200 K. The effects of these impurities on the electrical conductivity of the bulk and the grain boundaries has been investigated using frequency dispersion analysis (101-106 Hz). All investigated impurities have a negative influence on both the bulk and grainboundary conductivity. For Fe203 and AI203 grain-boundary segregation factors of about two are calculated.
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